Fiducial marker



FIG. 1 is a perspective view of the fiducial marker, incorporating the new design.

FIG. 2 is a side elevational view of the fiducial marker of FIG. 1.

FIG. 3 is a top view of the fiducial marker of FIG. 1.

FIG. 4 is a bottom view of the fiducial marker of FIG. 1; and,

FIG. 5 is a sectional view of the fiducial marker of FIG. 1, illustrating the divot shown in FIGS. 1 and 3.

The broken lines shown in the Figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for the fiducial marker, as shown and described. 